Dobby indicated by paper pattern



Dec. 15, 1942". v TURNER DOBBY INDICATED BY PAPER PATTERN Filed Feb. 9, 1942 2 Sheets-Sheet 1 Rum-mac} 6-. Tuanza A-r'roa NE'Y Dec. 15, 1,942. R. G, TURNER DOBBY INDICATED BY PAPER PATTEI RN Filed Feb. 9, 1942 2 Sheets-Sheet 2 EQVENTOR Ram-man 6- TURNER I -'6L4.//\"

ATTORNEY Patented Dec. 15, 1942 UNITED STATES. PATENT OFFICE DOBBY INDICATED BY PAPER PATTERN Richard G. Turner, Worcester, Mass., assignor to Crompton & Knowles-Loom Works, Worcester, Mass., a corporation of Massachusetts Application February 9, 1942, Serial No. 430,039

14 Claims.

This invention relates to improvements in dobbies more particularly of the type indicated by an endless paper pattern and it is the general object of the invention to construct the dobby in such a Way as to facilitate changing of the pattern.

In my co -pending application Serial No. 402,080 I have set forth a paper pattern'indicated dobby having a pattern reading unit supported at each end and movable toward and from pattern reading position. Because of the supports for the pattern reading mechanism there is some inconvenience in changing from one pattern to another. It is an important object of my present invention to provide a dobby wherein the pattern reading unit is supported entirely at one end thereof so that the endless paper pattern may be slipped over the other end of the mechanism.

It is desirable to be able to swing the pattern reading mechanism from its normal position to a position clear of the structure ordinarily above it for the purpose of repairing or replacing any of the pattern reading units and it is a further object of my present invention to provide a form of driving gear for the pattern reading mech anism which will permit the latter not only to reciprocate during its normal reading operation but also permit it to be swung angularly away from its normal position.

It is a more specific object of my present invention to provide a driving gear for the reading mechanism including a cylindrical rack mounted to receive reciprocating motion from a second driving rack operated by some actuating part of the 10cm and operative to reciprocate the circular rack for the purpose of moving the reading mechanism toward and from the sheet pattern.

With these and other objects in view which will appear as the description proceeds, my invention resides in the combination and arrangement of parts hereinafterdescribed and set forth.

In the accompanying drawings, wherein a convenient embodiment of my invention is set forth,

Fig. 1 is a rear elevation of a dobby made according to my present invention,

Fig. 2 is a side elevation looking in the direction of arrow 2, Fig, 1, on an enlarged scale,

Fig. 3 is a horizontal section on line 33 of Fig. 2, s

Fig. 4 is a detailed rear elevation looking in the direction of arrow 4. Fig. 3,

Fig. 5 is a fragmentary plan view of a portion of the sheet pattern used in connection with. my invention,

dobby designated generally at D. The dobby Fig. 6 is an enlarged horizontal view on line 6-6 of Fig. 2,

Fig. 7 is a diagrammatic plan view of the pattern reading mechanism showing the same in normal position in full lines and in position for repair in dotted lines, and

Fig. 8 is a detail front elevation looking in the direction of arrow 8, Fig. 2.

Referring to Fig. 1, I have shown a loom frame it having a, bracket l I on which is mounted the comprises front and back side plates l2. and I3, respectively, secured as at 14 to the bracket and having extending therebetween a pivot rod 15.

; A set of harness jacks [6 are pivoted on the rod I and are attached by connectors I! to harness mechanism not shown. Each jack has pivoted thereto as at l8 a jack lever l9 provided with top and bottom lifter hooks and 2|, respectively. These hooks have upwardly facing notches 22 on the outer or right hand end thereof as viewed in Fig. 1 for engagement with lifter knives to be described.

A shaft 25 is journaled for oscillation in the side plates I2 and I3 and has secured to the rear end thereof a three-armed lever 26 the intermediatearm 21 of which is driven by a vertically reciprocating rod 28. This rod may be connected to any suitable driving gear which will raise it on one pick of the loom and lower it on the next pick for the purpose of giving lever 26 a two-pick cycle of oscillation. The upper arm 300i? lever 26 is attached by means of connector 3! to the rear end of the upper lifterknife 32, while the lower arm 33 is similarly attached by connector 34 to the lower lifter knife 35. A second lever not shown herein butwell understood is connectedto the forward end of oscillating shaft 25 to drive the front ends of the knives by mechanism similar to that for their rear ends. one pick of the loom one of the knives will have a working stroke to the right as the other knife has-a return stroke to the left as viewed in Fig. 1, and on the next pick of the loom the direction of the knives is reversed so that one or the other of the knives will have a working stroke each pick.

The dobby set forth herein is indicated by a paper. pattern P having marginal perforations for engagement with driving pegs 4| on a pattern feeding cylinder 42.. The. latter extends transversely of the dobby and is mounted. on a shaft 43 driven through a clutch 44 by a worm gear 45. A worm 46 secured on a horizontal shaft 41 transverse of the cylinder meshes with the gear 45 and is so constructed as to give the cylinder feeding motions at two-pick intervals. In order to drive the shaft 41 I secure thereto a sprocket wheel 48 driven by a chain 49 connected to an appropriate driving part of the loom not shown operative to turn the shaft 41 every second pick of the loom In order that shaft 41 may be supported I provide a bearing bracket 50 secured as at I to the rear plate I3 of the dobby and extend bearing arms 52 therefrom for the shaft.

The sheet pattern may extend over guide rolls 55 mounted in open bearings foreasy removal from the dobby frame. Located between one of the guide rolls and the feed cylinder '42 is a stationary pattern guide unit 58 having top and bottom plates 59 and 5%, respectively, between which the pattern sheet passes. The sheet is provided with perforated and unperforated portions GI and 52, respectively, extending in pairs transversely of the sheet pattern, each pair constituting a pattern zone. These zones are fed successively to pattern reading position between the top and bottom plates 59 and 60 by the feed cylinder 42. Long and short lifter wires 65 and 65, respectively, have their lower ends guided by the plate 5!] and if desired by a second stationary plate 57 above plate 55'. Plates 5?! and 61 are fastened to small brackets 58 on dobby sides I2 and I3. The short wire 55 extends upwardly and over a stationary girt 59 while the long wire similarly extends over a second stationary girt II. There will be a long wire for each of the top hooks 20 and a short wire for each of the bottom hooks 2i. The long and short wires are preferably arranged in parallel rows transversely of the dobby to register with the perforated and unperforated portions of the zone in reading position.

The pattern reading mechanism designated generally at I5 comprises a back plate I6 having top and bottom horizontal flanges TI and I8, respectively, which guide pattern readers I9. Each reader comprises 'a stem or plunger 80 having an upper stop 8! under the top flange I1 and projects upwardly above said flange and preferably terminates just below bottom plate 60 when the mechanism 75 is in low position. The lower part of each stem projects through the bottom flange and a second stop 83 on the stem 85. Each spring 82 holds its corresponding reader normally in raised position with the stop 8I against the top flange 1'5, but each reader is slidable downwardly against the action of its spring relatively to the plate E5. The readers I9 are preferably arranged in two parallel transverse rows and each reader aligns with a lifter wire and is controlled by the pattern zone in reading position.

While the pattern reading mechanism is in low position a pattern zone will be moved to reading position over the readers 79 and under the lifter wires. After the sheet pattern has come to rest the reading mechanism I5 will rise and any reader I9 registering with a perforation will pass through the sheet pattern to lift the corresponding wire so that the associated hook will be moved upwardly into the path of its lifter knife. perforated portions of the sheet pattern will be held down with attendant compression of their springs 82 and the corresponding lifter wires and hooks will remain down out of the path of their lifter wires.

"The matter thus far described, with slight- Those units It which engage un-- variations, may be substantially the same as that set forth in my co-pending application. The sheet pattern is fed so that the zones arrive successively and at two-pick intervals in reading position and the pattern reading mechanism rises by mechanism to be described every second pick of the loom.

My present invention relates more particularly to the driving gear for the pattern reading mechanism I5 and in carrying my invention into effect I provide means whereby mechanism I5 may be operated from one end thereof while the other end is unsupported to facilitate changing of endless sheet patterns. Accordingly, I provide the rear plate I3 of the dobby frame with an upper bearing through which slides the upper end 9I of a cylindrical rack bar 92. The lower end 93 of the rack bar slides through a second bearing 94 supported from the previously described bearing rack 50. Top and bottom support arms 95 and 96, respectively, extend from the plate 16 and are secured as at 91 to the rack 92. Between the arms 95 and 96, I provide the rack bar with a set of teeth I50 which are circular to form a cylindrical rack which moves with the pattern reading mechanism 15.

In order that the rack 92 may be reciprocated I provide a bearing arm I02 on the bracket 50 and pivot thereto as at I53 the lever I04 having in the present instance a segmental rack I05 the teeth I56 of which mesh with the teeth I00. The left end of lever I04 as viewed in Fig. 2 is provided with a roll IO'I received by a groove cam I08 secured to shaft 41. The cam has a high position dwell III) of an arcuate length substantially more than and a second low position dwell III less than 180. These two dwells are connected by inclines H2 and as the shaft 41 rotates the roll IB'I follows the groove of the cam to cause vertical oscillation of segment I05 about its center I63.

In the matter thus far described the pattern reading unit I5 will be in low position when the roll IE1 is in the dwell I I I and during this period the pattern cylinder advances to feed another pattern zone to reading position. After the pattern has come to rest the roll IB'I moves down one of the inclines II2 to the dwell II 0 and in doing so raises the mechanism I5 to cause cooperation between the readers and the pattern zone in reading position for the purpose of determining the vertical position of the hooks of the dobby. The reading mechanism I5 will remain raised for substantially more than one pick of the loom and it is for this reason that the dwell I I0 extends around shaft 47 for an angular distance of more than 180. After the reading mechanism I5 has remained raised long enough to permit'both of the lifter knives to engage the hooks which have been moved into their paths the roll I01 will move along the other incline and the pattern reading mechanism will descend to permit movement of the next pattern zone to reading position.

In order that the pattern reading mechanism may be held in proper alignment with the zone in reading position I provide a guide which includes an arm I20 keyed as at I2I to the upper end of the rack bar and provided at its left end as viewed in Fig. 2 with a vertical guide pin I22 which extends downwardly through the horizontal part of the bracket 98. A slide bore I23 in bracket 90 receives the pin and is so located as to maintain the rows of pattern readers II! in alignment with the pattern zone in reading position. When it is desired to swing the mechanism I5 from its normal position shown in full lines in Fig. '1 to the dotted position for the purpose of repairing any of the readers I3 the pin I22 will be removed from the bore I23, after which the mechanism I5 can be swung angularly due to the fact that the teeth I of the rack 92 are circular and turn through the slots between the teeth I on the segment I05 while maintaining driving contact and supporting relationship therewith in all angular positions with respect to the segment I05. This angular motion of the mechanism 15 preferably occurs when it is in lowest position so that the sheet pattern will not betorn by any of the upwardly projecting plungers 80, After the repair has been made the mechanism I5 is returned to its normal position and the pin I22 replaced.

The upper guide plate 59 is permanently fixed as already described, but the lower plate 60 must be held by a removable support to permit removal of the sheet pattern. The forward end of plate 50 is therefore supported by a pair of clips I30 pivoted at I3I to the small brackets 68 and having feet I32 which extend under plate 60 to hold them in normal position. Removable pins I33 inserted through the clips as shown in Fig. 8 and into brackets 68 hold the clips in their working position. When it is desired to remove the endless pattern cylinder the pins I33 are removed and the clips I30 swung to the position suggested in dotted lines in Fig. 8 so that the forward end of the plate 50 is free and the sheet pattern canbe moved endwise, or to the right as viewed in Fig. 2 when the mechanism I5 is down. It will be observed thatthe forward end of the mechanism I5, being supported entirely from its rear end, offers no interference to the sheet pattern when it is being removed.

From the foregoing it will be seen that I have provided pattern reading mechanism mounted at one end thereof so that it does not interfere with the removal of the endless pattern. It will further be seen that this result is accomplished by mechanism which permits the pattern mechanism 15 to swing from its normal position to a temporary position for the purpose ofrepairing the readers 79. It is also noted that a guide is provided, such as the pin I22, which requires the pattern reader to move toward and from the pattern zone in reading position in correct alignment therewith, The guide is detachable, however, to permit the aforesaid swinging of mechanism 15. While I have shown a segmental rack as the actuator for the cylindrical rack I do not wish necessarily to be limited to this type of actuating rack.

Having thus described my invention it will be seen that changes and modifications may be made therein by those skilled in the art without departing from the spirit and scope of the invention and I do not wish to be limited to the details herein disclosed, but what I claim is:

1. In loom pattern mechanism having a frame and operating with a set of harness controlling lifters extending transversely of said frame, pattern reading means comprising an elongated body provided with pattern readers for said lifters and extending transversely of said frame. an endless sheet pattern having perforated and unperforated portions constituting pattern zones to move successively between said lifters and readers, and operating mechanism for said reading means supported on said frame at one side of permit the endless sheet pattern to be slipped over said other end of said reading means.

2. In loom pattern mechanism having a frame and operating with a set of harness controlling lifters extending transversely of said frame, pattern reading means comprising an elongated body provided with pattern readers for said lifters and extending transversely of said frame, an endless sheet pattern having perforated and unperforated portions constituting pattern zones to move successively between said lifters and readers, and supporting and operating mechanism for said reading means supported on said frame at one side of the loop for moving the pattern reading means toward said sheet pattern and lifters, the other end of said reading means being free and unsupported except by said operating mechanism to permit the endless sheet pattern to slip over said other end of the reading means.

3. In loom pattern mechanism having a frame and operating with a set of harness controlling lifters, a set of pattern readers for said lifters, a pattern sheet formed .in a loop located between said readers and lifters to control said readers, carrier means for said readers to enter the loop from one side thereof, and means located outside said loop and adjacent to said one side only to support and move said carrier and readers toward the pattern sheet.

4. In loom pattern mechanism having a frame and operating with a set of harness controlling lifters, a set of pattern readers for said lifters, a pattern sheet formed in a loop located between said readersand lifters to control said readers, a carrier for said readers located in the loop and having an end projectingout of one side of the loop, and an actuator and support connected to said one end of said carrier to move-the latter and readers toward the sheet pattern, the opposite end of said carrier being free and unsupported except by said actuator and support to permit the pattern sheet to be slipped over said opposite end of the carrier by movement in a direction away from said actuator and support.

5. In loom pattern mechanism having a frame and operating with a set of harness controlling lifters, a set of pattern readers for said lifters, a pattern sheet formed as a loop located between said readers and lifters to control said readers, a carrier for said readers located within the loop, and a combined actuator and support for the carrier mounted on said frame and located on said one side of the loop, said actuator and support effective to move the carrier and readers toward the sheet patttern, that. end of the carrier opposite the actuating means being supported entirely from said one side of the loop so that the sheet pattern can be slipped over said opposite end of the carrier in a direction away from said actuator and support.

6. In a loom pattern mechanism having a frame and operating with a set of harness controlling lifters, pattern reading'mechanism including a set of pattern readers for the lifters, a sheet pattern to control the readers located between said lifters and readers, a rack slidably mounted on said frame and secured to said pattern reading mechanism, and means including a toothed member in engagement with the rack to move thelatter in a direction to move said reading mechanism toward'the sheet pattern and lifters.

'7.In "a loom pattern mechanism having a frame and operating witha'set of harness controlling lifters, .pattern reading mechanism vincluding a-set of pattern readers for the lifters, a sheet pattern to control the readers located .be tween said lifters and readers, aslidable rack secured to the pattern reading mechanism, guide means on said frame for said rack to .direct the reading mechanism toward the sheet pattern, and a toothed actuator meshing with the rack to move the latter in a direction to cause the reading mechanism to move along said guide means toward said sheet and lifter.

8.-In a loom pattern 'mechanism having a frame and operating with a set ofharness controlling lifters,"a pattern reading mechanism including'a set of patternreaders for'the lifters, an endless sheet patternto control the readers located between the readers and lifters, a rack movably mounted on said frame and secured to said reading mechanism on one end thereof outside said endless sheet pattern, and a toothed member on said frame and located adjacent to said one end of the reading mechanism and meshing with the rack to cause the latter to move the reading mechanism toward the sheet pattern and lifters.

9. In loom pattern mechanism having a frame and operating with a set of harness controlling lifters extending transversely of said frame, pattern reading mechanism comprising an elongated body provided with patternreaders for said lifters and extending transversely of said frame, a sheet pattern having perforated and unperforated portions constituting pattern zones which move progressively between said lifters and readers, a rack secured to said reading mechanism, means on the frame to guide said rack in a direction transversely of the sheet pattern,.and a segment actuator gear mounted on saidvframe and meshing with said rack and operative to move the latter in a direction to cause said reading mechanism to move toward the .sheetpattern and said lifters.

10. In a loom pattern mechanism having a frame and operating with a set of harness controlling lifters, a pattern reading mechanism including a set of pattern readers for thelifters, a sheet pattern located between the readers and the lifters, a rack having arcuate teeth secured to said pattern reading mechanism and supported for longitudinal and angular movement on the frame, and a toothed actuator meshing with said arcuate teeth and effective to move the latter to cause the rack to move the reading mechanism toward the sheet pattern and. lifters, said rack and reading mechanism being movable angularlywith respect to said frame away from said lifters and about the axis of said rack while the driving toothed actuator remains in mesh with said arcuate teeth.

11. In a loom pattern mechanism having a frame and operating with a set of harness controlling lifters, a pattern reading mechanism includinga set of pattern readers located in alignment with their respective lifters when the read ing mechanism is in normal position, a sheet pattern between the readers and the'lifters, a rack having circular teethand secured to and moving with the reading mechanism,.means on the frame to mount said rack for sliding and rotary motion, and an actuating toothed member meshing with said rack to cause the latter to move in a direction to move said reading mechanism toward the sheet pattern, said reading mechanism and rack being movable'angularly with respect to said frame and away from the normal position thereof'while said circular teeth remain in mesh with the actuating toothed member.

12. In a loom pattern mechanism having a frameand operating with a set of harness controlling lifters, a pattern reading mechanism including a set of pattern readers for the lifters, a sheet pattern to control the readers passing between the latter and the lifters, a rack secured to and moving with said reading mechanism and mounted on the frame for sliding movement transversely of the sheet pattern and for angular movement about an axis transverse of the sheet pattern, said rack having arcuate teeth, an actuating toothed member meshing with the teeth of the rack and effective to move the latter in a direction to cause said reading mechanism to move toward the sheet pattern, and guide means eccentric with respect to the axis of the rack to cooperate with the latter to hold the reading mechanism in normal position aligned with said lifters, saidguide means being removable and the rack thereupon being rotatable about said axis away from normal position.

13. In a loom pattern mechanism having a frame and operating with a set of harness controlling lifters, a pattern reading mechanism including a set of pattern readers for the lifters, a sheet pattern to control the readers passing between the latter and the lifters, a driven rack rigid with the pattern reading mechanism and slidable on said frame, a driving rack meshing with the driven rack, and means to move said driving rack through a given range of movement to cause said drivenrack to move the reading mechanism toward the sheet, said driving rack supporting the driven rack and reading mechanism for all positions of the latter.

14. In a loom 'patern mechanism having a frame and operating with a set of harness controlling lifters, a pattern reading mechanism including a set of pattern readers for the lifters, a sheet pattern to control the readers passing between the latter and the lifters, driving and drivenpermanently meshing rack members, the driven member being secured to the pattern reading mechanism and guided for sliding motion with respect to the sheet pattern, and means to reciprocate the driving rack member through a working range to move the driven rack memher and pattern reading mechanism toward and from the sheet pattern, said driven rack member and pattern reading mechanism being supported by the driving rack member in all positions of the latter throughout the working range thereof.

i RICHARD G. TURNER. 

